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J. H. LONGSTREET & J. E. WRIGHT. PRINTING TELEGRAPH.

' No. 245,732. Patented Aug. 16,1881.

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I 2 Sheets-Sheet 2. J. H. LONGSTREET 82; J. E. WRIGHT.

PRINTING TELEGRAPH.

No. 245,732. Patented. Aug. 16,1881.

(No Model.)

ATTEIET= UNITED STATES PATENT OFFICE.

J. HOLMES LONGSTREET, OF HOBOKEN, NEW JERSEY, AND JOHN E.

' WRIGHT, OF NEW YORK, N. Y.

PRINTING-TELEGRAPH.

SPECIFICATION formingpart of Letters Patent No. 245,732, dated August16, 1881.

Application filed June 22, 1881.

To all whom "it may concern Be it known that we, J. HOLMES LONG- STREET,a citizen of the United States, residing at Hoboken, in the county ofHudson and State of New Jersey, and JOHN E. W'RIGHT, a citizen of theUnited States, residing at New York, in the county of New York and Stateof New York, have invented certain new and useful Improvements inPrinting-Telegraphs, of which the-following is a specification.

The object of our invention is to increase the speed at whichprinting-telegraphs may be operated, and a further object is to improvethe construction of the devices used in setting the type-wheel tounison.

Our invention consistsin a certain novel construction of theelectromagnetic devices used in rotating or controlling the movements ofthe type-wheel, and in a novel unison mechanism, the peculiarities ofwhich will be hereinafter described and claimed.

Figure 1 is a side elevation of a printingtelegraph machine of ordinaryconstruction.

Fig. 2 is a top view thereof. Fig. 3 is a detail view of the unisonmechanism, and Fig. 4 is a detail perspective view of theelectromagnetic devices which serve to rotate or control the movement ofthe type-wheel.

Our invention, so far as the type-wheel devices are concerned, isintended for application to that class of printing-telegraphs in whichthe movements of the type-wheel are controlled by reversed currents, andin which the printing is effected by a prolonged current of eitherpolarity.

A represents a type wheel upon a shaft geared to a driving-train ofordinary construction, and provided with an escapement-Wheel, themovementof which is controlled by an anchor-escapement vibrated by apolarized electro-magnet. The anchor-escapement is shown at 3 engagingwith the escape-whee1 4.. It is attached to an extension, 5, from arock-shaft, 6, which carries a hollow slotted vibrating core, a, of anelectro-magnet, B.

Grepresents a permanent horseshoe-magnet secured to the side of theframe D. The upper ends of the magnet are bent over into a horizontalplane, as shown at E, and are provided with adjustable pole-extensionsF, be-

(No model.)

tween which the upper end of the tubular slotted core a, vibrates whenreversed currents pass through the helices of B. This construction is ofextreme simplicity, and the devices are found to respond with certaintyand force to reversed impulses of extreme rapidity, thus allowing ot' amaterial increase in the speed with which the type-wheel may be rotated.

G represents the printing electro-magnet, and c a tubular slotted corein one ot'its helices, which is mounted upon a rock-shaft, one end ofwhich is seated in the bracketv h. The upper end of the core vibrates toand from the bar 1, extending horizontally from the core of the otherhelix of the magnet. The printingpad is carried by a lever, m, pivotedat H and provided with a horizontal transverse extension, k, to which isattached a vertical extension, n, the end of which enters the top of thetubular core 0. A set-screw, p, in the end of the core serves to adjustthe amount of play of the part at within the core.

Attach ed to lever m is the arm M, which controls the unison devices andunlocks the unison stop from the train wherever the printingpad isoperated. The unison device itself is shown in Fig. 3.

L is a ratchet-wheel attached to a slowlymoving shaft of the train whichixnpels thetype-wheel, and moving continuously in the directionindicated by the arrow. Fitted loosely to the same shaft is thelocking-arm 1? of the unison stop mechanism, while B is an arm fixed tothe type-wheel shaft, which engages with 1? when the latter is raised tothe proper point.

Pivoted to the arm P is a gravity or spring pawl, S, which tends toconstantly engage with the ratchet-wheel L, thus locking the arm P tothe train and causing said arm to be lifted toward a point where it willlock the typewheel shaft. The pawl S is provided with a curvilinearextension, 1?, against which the arm M impinges whenever theprinting-pad is operated, thus disengaging the pawl from the ratchetwheel L and allowing the arm 1 to drop back by the action of gravity ora spring to its starting-point. The curvilinear extension t at the sametime rests upon and slides upon the arm M, and the pawl is thusprevented from re-en gaging with the ratchet before the arm P hascompleted its movement.

The operation of these devices will be readily understood. The motion ofthe wheel L is so small with relation to that of the type-wheel that twoor more revolutions of the latter are required before the arm P israised sufliciently to engage with R. In the normal operation of themachine the printing-pad is operated and the pawl disengaged before thearm P engages with B. When it is desired to set the typewheel to theunison-point it is made to revolve continuously without operating theprintingpad until the wheels of all the instruments upon the line arelocked at the unison-point. The pawl S is then unlocked from theratchetwheel by the action of the printing-lever, thus allowing the armP to drop back into normal position, unlocking the type-wheel. Thetypewheels at all stations then start from the unison-point.

What we claim as our invention is-- 1. The combination, with theescapement mechanism of a printing-telegraph, of a rockshaft carryingthe escapement devices, a tubular slotted vibrating core mounted uponsaid rock-shaft, a stationary helix, and a permanent magnet Whose polesembrace the vibrating end of the tubular core, substantially asdescribed.

2. The combination, substantially as described, ot' the permanent magnetO, the ends E ot which are bent at right angles, the hollow slotted corea, rock-shaft, stationary coil B, and the escapement devices of aprinting-telegraph.

3. A unison-sto p device consisting of a locking-arm for the type-wheelmounted loosely upon a shaft of the driving-train, a toothed wheel keyedto said shaft, devices adapted to positively lock the arm to the toothedwheel, so that it may be propelled positively toward a point where itwill stop the movement of the type-wheel shaft, and disconnectingmechanism operated by the printing devices, substantially as described,whereby the arm may be unlocked from the wheel and allowed to drop backto a starting-point by the action of gravity or a spring.

4. The combination, with the revolving typewheel and projecting armrevolving therewith, ot the locking-arm P, pawl S, curvilinear extensiont, disengagingarm m, connected to the printing devices, andratchet-wheel L, the latter arranged to propel the arm against the ac-'tion of gravity or a spring toward a point where it will lock thetype-wheel from rotation, substantially as described.

J. HOLMES LONGSTREET. JOHN E. WRIGHT. Witnesses:

J. LEDYARD HODGE, ALBERT GLEASON.

